| IDATARBELL | "The History of the Standard Oil Company" journalist |
| AFFIRMED | Supported a fine company journalist (8) |
| TARBELL | Ida ___, US investigative journalist whose The History of the Standard Oil Company (1904) hastened the breaking up of that company's monopoly (7) |
| IDA | "The History of the Standard Oil Company" author Tarbell |
| ROCKEFELLER | The success of his venture, the Standard Oil Company, made him the richest man in the world, John D |
| AMOCO | Oil company which merged with BP in 1998, formerly the Standard Oil Company (5) |
| ESSO | Petrol associated with the Standard Oil Company of New Jersey |
| MOBIL | What the Standard Oil Company of New York later became |
| HERALDRY | The study of coats of arms and of the history of the families who are entitled to them (8) |
| CLARENDON | 1st Earl of -; title of Edward Hyde, Lord Chancellor to Charles II, author of The History of the Rebellion (9) |
| EDWARDGIBBON | Author of The History of the Decline and Fall of the Roman Empire |
| GIGAWATT | One billion of the standard unit of electrical power |
| GATES | United States computer entrepreneur whose software company made him the youngest multi-billionaire in the history of the United States (born in 1955) |
| THEODORA | Wife of Emperor Justinian I considered the most influential and powerful woman in the history of the Byzantine Empire |
| IWOJIMA | One of the bloodiest battles in the history of the U.S. Marine Corps (3,4) |
| DRED | ___ Scott v. Sandford (1857 decision widely regarded as one of the worst in the history of the Supreme Court) |
| CHRIS | Who is the only player to score two hundreds in the history of the tournament so far, the most by any player? (5) |
| PAVEY | Jo _, 2014 European Championships 10,000m gold medallist for Great Britain; oldest female winner in the history of the competition at the age of 40 Years and 325 Days (5) |
| GEOFFREYOFMONMOUTH | Cleric who wrote The History of the Kings of Britain |
| DELUXE | Whihc version of the Standard Ensign replaced the Vanguard in 1962? (2,4) |
